The Pepsi Max 400 was a NASCAR Sprint Cup Series stock car race held annually at the Auto Club Speedway in Fontana, California.

[1] The event was first held in 2004, added as part of the 2004 NASCAR Realignment, and was partially featured in the film, Herbie: Fully Loaded.

From its inception until 2008 the race was run on Labor Day weekend, which was previously the traditional date of the Southern 500 at Darlington, and in the Inland Empire in the 1970s, the former California 500 United States Auto Club Marlboro Championship Trail race.

As part of the 2009 realignment in NASCAR Auto Club Speedway, Talladega Superspeedway, and Atlanta Motor Speedway agreed to switch dates, with the Atlanta race moving from its traditional fall date to Labor Day weekend and becoming known as the Labor Day Classic 500.

The realignment returned the Labor Day weekend race to the southern United States and gave California its first late season race since the final running of the Winston Western 500 at Riverside International Raceway in 1987.